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Finding the Fourth Proportional to 659,012.78, 988,325.40 and 279,930.50

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Solution

The fourth proportional to 659,012.78, 988,325.40 and 279,930.50 is: 419,813.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,012.78 : 988,325.40 = 279,930.50 : x
  2. Step 2: Convert to fraction form
    659,012.78/988,325.40 = 279,930.50/x
  3. Step 3: Cross multiply
    659,012.78x = 988,325.40 × 279,930.50
  4. Step 4: Simplify right side
    659,012.78x = 276,662,423,384.70
  5. Step 5: Solve for x
    x = 276,662,423,384.70/659,012.78
  6. Step 6: Final answer
    x = 419,813.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.